networking - Ethernet disconnects after few minutes in Ubuntu 16.04 - Ask Ubuntu

i installed ubuntu 16.04 last month , working fine till yesterday when college's server shifted.now connection disconnects after few minutes (although shows connected),and browser shows "network interrupted" error. chrome runs firefox doesn't work @ all.

i tried this(ubuntu 16.04 ethernet issues ) did'nt work.

on running :    sudo lshw -c network 

*-network

   description: wireless interface    product: rt5390 [802.11 b/g/n 1t1r g-band pci express single chip]    vendor: ralink corp.    physical id: 0    bus info: pci@0000:07:00.0    logical name: wlo1    version: 00    serial: 7c:e9:d3:9f:92:29    width: 32 bits    clock: 33mhz    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless    configuration: broadcast=yes driver=rt2800pci driverversion=4.4.0-45-generic firmware=0.34 ip=10.42.0.1 latency=0 link=yes multicast=yes wireless=ieee 802.11bgn    resources: irq:16 memory:c3500000-c350ffff 

*-network

   description: ethernet interface    product: rtl8101/2/6e pci express fast/gigabit ethernet controller    vendor: realtek semiconductor co., ltd.    physical id: 0    bus info: pci@0000:08:00.0    logical name: eno1    version: 05    serial: a0:b3:cc:70:38:ea    size: 100mbit/s    capacity: 100mbit/s    width: 64 bits    clock: 33mhz    capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation    configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3lk-napi duplex=full firmware=rtl_nic/rtl8105e-1.fw ip=172.17.9.63 latency=0 link=yes multicast=yes port=mii speed=100mbit/s    resources: irq:26 ioport:3000(size=256) memory:c3404000-c3404fff memory:c3400000-c3403fff 

i newbie in kind of matter.does please have answer?

thank in advance

i read through link attached in post , bit caught attention ipv6. i've noticed behavior ipv6.

how connected? in housing, connected router, connected wall? connected on ethernet or connected via wifi? connected unified wireless network move campus? issue happen on both interfaces or one?

the next time problem happens, open shell , type:

ifconfig

look , see ip address is.

try ping gateway

try ping 8.8.8.8

try ping different web domain other went offline.

your send failing. connected , send succeeding route has issue you're not getting reply. went through no route issue on vpn tunnel myself.

if notice have ipv6 address , should able connect on ipv4, try following:

sudo dhclient -r <interface-name> sudo dhclient -4 <interface-name> 

^^ clarify above, ^^ interface name found ifconfig command. 2 commands should force interface release dhcp lease , request ipv4 dhcp lease. if find works, need edit interface config network communicates on ipv4. can through network manager or manually through config files.